Threading tool



Jan. 6. 1 925. 1,522,443

T. D. GRIFFIN ET AL THREADING TOOL Filed Sept 11, 192 2 Sheets-Sheet 1 7% 0m 62 J 2 Grz'ff 'n Jamzaei Z ZZZ/n er' INVENTOR WITNESS:

Jan. 6. 1925. 1,522,443

T. D. GRIFFIN ET AL THREADING TOOL Filed Sept. 11, 1922 2 Sheets-Sheet 2 772 omas Z2 Griffin Jamwel Z [[Zmer ATTORNEY WITNESS Patented den. 6, 1925.

UNITE STATES PATENT OFFICE.

{enemas n; GRIFFIN" AND SAMUEL n. omens, or Brwnson, scorn oABoLLuA.

THREAIDING TOOL.

Application filed September 11, 1922.

To all whom. it may concern:

Be it known that we, THOMAS D. GRIFFIN and SAMUEL E. ULMER, citizens of the United States, residing at Brunson, in the county of Hampton and State of South Carolina, have invented new and useful Improvements in Threading Tools, of which the following is a specification.

This invention relates to a threading tool, the general object of the invention being to provide means whereby the dies can be released from the part being threaded as soon as the threads are completed so that it is not necessary to unscrew the threaded part from the dies.

rrnother object of the invention is to make the holder for the dies so that it can be placed in an ordinary brace.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing our invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure l is a View showing the device associated with a brace.

Figure 2 is an enlarged sectional view through the device showing the dies in operative position.

Figure 3 is a similar view with the dies separated.

Figure 4 is a section on line 4 4: of Figure 3.

Figure 5 is an end view of Figure 2.

Figure 6 is a view of a tool for threading nuts and the like.

In these views 1 indicates the holder of the threading device and 2 indicates the brace for rotating the tool. The holder is provided with a shank 3, the end of which is formed to engage a socket in the brace. A pair of spring jaws 4: are suitably secured to the shank, the inner portions of the jaws tapering and the outer portions being of substantially channel shape. A cross piece 5 is connected with one jaw and passes through an opening in the other jaw where Serial No. 587,510.

it is pivoted to a locking lever 6, these parts being so arranged that when the lever is swung against one of the jaws the jaws will be closed and when the lever is moved atright angles to the holder. the jaws will spring open. A cross piece 7 is connected with the channel-shaped part of each jaw, this piece forming a seat for a die block 8 which is secured to the jaw by the set screw 9. The abutting faces of the blocks are provided with semi-circular grooves 10 which are provided with the cutting threads to form threads upon an article placed between the blocks.

It will be seen that when the jaws are closed the semicircular grooves 10 will form a circular threaded hole to receive the part to be threaded so that when the device is rotated on said part threads will be formed thereon. As soon as the threads are completed it is simply necessary to swing down the lever 6 when the spring jaws will spring apart and thus cause the die blocks to re lease the part being threaded. Die blocks of ifferent sizes can be used so that articles of different sizes can be provided with different threads.

We also provide a bit 10' which has its outer end of tapered shape, as shown at 11, and this part is provided with threads so that it can be used as a tap to form threads upon a nut or the like. This device is also used with a brace and it may be made in different sizes to suit different sizes of nuts.

It is thought from the foregoing description that the advantages and novel features of our invention will be readily apparent.

lVe desire it to be understood that we may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What we claim is A device of the class described comprising a holder comprising a stem, a pair of spring arms connected therewith, the lower ends of the arms being of formation, a cross piece located in the jaw part of each arm and spaced from the end thereof, a die block carried by each arm and resting against the cross piece, means for detachably holding the die blocks in place, said arms having holes therein located above the cross the mm is swung upwardly to move the pieces, a second cross piece passing through spring arms towards each other.

the holes and having parts engaging the In testimony whereof We afiix our signa- 10 outer faces of the arms and a locking lever tures.

5 pivotally connected With one end of the last mentioned cross piece and having apart for engaging one of the spring arms When THOMAS D. GRIFFIN. SAMUEL E. ULMER. 

